$ filebot
Error: LinkageError occurred while loading main class net.filebot.Main
java.lang.UnsupportedClassVersionError: net/filebot/Main has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 54.0

Here’s some additional info:

With 4.8.2 I was using Oracle Java 8 (from https://launchpad.net/~webupd8team/+archive/ubuntu/java). Since 4.8.5 required openjdk-11-jre I uninstalled Oracle Java and installed openjdk-11-jre instead, and got the error message above the very first time I tried to run filebot.

I tried installing openjdk-11-jre and filebot 4.8.5 on another machine with a fresh install of Ubuntu 18.04 (with no previous Java or filebot installs) with the same result.

Reverting to filebot 4.8.2 works with both openjdk-11-jre and Oracle Java 8.

Please let me know if I can provide you with any additional information.

Oh shit, good catch! The latest revision does indeed try to modify the last modified date, but make sure source / destination file have the exact same last modified date after processing... which is a problem if the source file has already been moved, and thus doesn't have a last modified date. Ups. Will be fixed ASAP.

Unfortunately, this crash log doesn't tell us much, so I have no idea why it doesn't work on your machine, or how to fix it. You could try things, like using the CLI instead of the GUI, trying things on a different computer, etc, to maybe narrow things down.